Thank you, it should be 60 and not 90. Text will be fixed.
Going by the item description alone, it says ghost and the chance of endow is increased per refine level of the headgear. However, if the chance only procs ONCE then the script may need checking.
物理攻撃命中時、 一定確率で60秒間、武器に念属性を付与する
Yeah, i tested it, it was like 100% proc, but had to re-equip if i wanted it to work again